by.bigvova.MainUI.java Source code

Introduction

Here is the source code for by.bigvova.MainUI.java

Source

/*
 * Copyright 2015 The original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package by.bigvova;

import by.bigvova.backend.controllers.UserController;
import by.bigvova.backend.controllers.UserControllerUtils;
import by.bigvova.backend.event.Event.ProfileUpdatedEvent;
import by.bigvova.backend.event.EventBus;
import by.bigvova.backend.to.UserTo;
import by.bigvova.views.AccessDeniedView;
import by.bigvova.views.ErrorView;
import by.bigvova.views.ProfilePreferencesWindow;
import com.google.common.eventbus.Subscribe;
import com.vaadin.annotations.Push;
import com.vaadin.annotations.Theme;
import com.vaadin.annotations.Widgetset;
import com.vaadin.navigator.Navigator;
import com.vaadin.server.*;
import com.vaadin.shared.ui.label.ContentMode;
import com.vaadin.shared.ui.ui.Transport;
import com.vaadin.spring.annotation.SpringUI;
import com.vaadin.spring.navigator.SpringViewProvider;
import com.vaadin.ui.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationContext;
import org.vaadin.spring.security.VaadinSecurity;
import org.vaadin.spring.security.util.SecurityExceptionUtils;
import org.vaadin.spring.sidebar.components.ValoSideBar;
import org.vaadin.spring.sidebar.security.VaadinSecurityItemFilter;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Locale;

@SpringUI
@Theme("calorinote")
@Widgetset("widgetset.WidgetSet")
@Push(transport = Transport.WEBSOCKET)
public class MainUI extends UI {

    @Autowired
    ApplicationContext applicationContext;

    @Autowired
    VaadinSecurity vaadinSecurity;

    @Autowired
    VaadinSession vaadinSession;

    @Autowired
    SpringViewProvider springViewProvider;

    @Autowired
    ValoSideBar sideBar;

    @Autowired
    UserController controller;

    @Value("${foodnote.path.to-profile-images}")
    private String pathToProfileImage;

    private final EventBus eventBus = new EventBus();

    private MenuBar.MenuItem settingsItem;
    private Resource resource;

    @Override
    protected void init(VaadinRequest request) {
        EventBus.register(this);
        getPage().setTitle("FoodNote");
        UI.getCurrent().setLocale(Locale.forLanguageTag("ru-RU"));
        // Let's register a custom error handler to make the 'access denied' messages a bit friendlier.
        setErrorHandler(new DefaultErrorHandler() {
            @Override
            public void error(com.vaadin.server.ErrorEvent event) {
                if (SecurityExceptionUtils.isAccessDeniedException(event.getThrowable())) {
                    Notification.show("Sorry, you don't have access to do that.");
                } else {
                    super.error(event);
                }
            }
        });
        HorizontalLayout layout = new HorizontalLayout();
        layout.setSizeFull();

        // By adding a security item filter, only views that are accessible to the user will show up in the side bar.
        sideBar.setItemFilter(new VaadinSecurityItemFilter(vaadinSecurity));
        sideBar.setHeader(new CssLayout() {
            {
                Label header = new Label("<span>Food</span>Note", ContentMode.HTML);
                header.setWidth(100, Unit.PERCENTAGE);
                header.setHeightUndefined();
                addComponent(header);
                addComponent(buildUserMenu());
            }
        });
        sideBar.getHeader().setStyleName("branding");
        layout.addComponent(sideBar);

        CssLayout viewContainer = new CssLayout();
        viewContainer.setSizeFull();
        layout.addComponent(viewContainer);
        layout.setExpandRatio(viewContainer, 1f);

        Navigator navigator = new Navigator(this, viewContainer);
        // Without an AccessDeniedView, the view provider would act like the restricted views did not exist at all.
        springViewProvider.setAccessDeniedViewClass(AccessDeniedView.class);
        navigator.addProvider(springViewProvider);
        navigator.setErrorView(ErrorView.class);
        navigator.navigateTo(navigator.getState());

        setContent(layout); // Call this here because the Navigator must have been configured before the Side Bar can be attached to a UI.
    }

    private Component buildUserMenu() {
        final MenuBar settings = new MenuBar();
        settings.addStyleName("user-menu");
        final UserTo userTo = controller.getUserTo();
        settingsItem = settings.addItem("", resource, null);
        updateUserMenu(null);
        settingsItem.addItem("Edit Profile", new MenuBar.Command() {
            @Override
            public void menuSelected(final MenuBar.MenuItem selectedItem) {
                ProfilePreferencesWindow.open(userTo, resource, controller, pathToProfileImage);
            }
        });
        settingsItem.addSeparator();
        settingsItem.addItem("Sign Out", new MenuBar.Command() {
            @Override
            public void menuSelected(final MenuBar.MenuItem selectedItem) {
                vaadinSecurity.logout();
            }
        });
        return settings;
    }

    @Subscribe
    private void updateUserMenu(final ProfileUpdatedEvent event) {
        UserTo userTo = controller.getUserTo();
        String imageName = userTo.getImageName();
        String fullPathToProfileImage = pathToProfileImage + '/' + imageName;
        settingsItem.setText(userTo.getName());
        String relativePathToProfileImage = UserControllerUtils.getPathToProfileImage(userTo, true);
        if (Files.exists(Paths.get(fullPathToProfileImage))) {
            resource = new FileResource(new File(fullPathToProfileImage));
        } else {
            resource = new ThemeResource(relativePathToProfileImage + "profile-pic-300px.jpg");
        }
        settingsItem.setIcon(resource);
    }

    public static EventBus getEventbus() {
        return ((MainUI) getCurrent()).eventBus;
    }

}